This week the concept which I found to be very clear and educational was Communications Devices. There are many different devices used to transmit and receive data. The most common devices are Dial-Up Modems, ISDN, DSL, and Cable modems. A Dial-Up Modem uses a homes telephone line to transmit and receive data. An ISDN modem sends information to an ISDN line and receives information from an ISDN line. A DSL modem uses a DSL line to transmit and receive data and a Cable modem uses a homes cable tv line to transmit and receive data.
These devices are instrumental in the success of a business. Without the use of a Communications device a business could not transmit and receive data. A good example of this is a banks ATM machine. When you use the machine it transmits the transaction to the main computer to verify the information, then receives data from the main computer on how to proceed.
An article I found on WiFi Notes.com located at http://www.wifinotes.com/computer-networks/network-communication-devices.html did an excellent job of elaborating on the hardware involved in communications devices as well as the process associated with each.
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